Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3c300a616f866d3…

MALICIOUS

PDF

40.8 KB Created: 2020-08-21 22:57:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01372cbaec2523de0528eca9cdc8e399 SHA-1: fa8c0b8be820acd97e88e91279c9e653b903ffb7 SHA-256: d3c300a616f866d3639957944d890069a1d22f6a47ed557945a401415dc1fbac
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to ttraff.com, which is disguised as a 'decimal to fraction practice worksheet'. The document also exhibits characteristics of a PDF link farm, with numerous embedded URLs, many of which are hosted on cdn.shopify.com or similar domains, likely for SEO manipulation to increase visibility. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/pify?keyword=decimal+to+fraction+practice+worksheet
    • http://kojeva.readwithmeaspen.com/uploads/1/3/2/7/132740414/bikabivu.pdf
    • http://files.ucsdnoyce.org/uploads/1/3/0/8/130814529/fuzumunan_soxes_mifadal.pdf
    • http://files.pittsburghaiha.org/uploads/1/3/2/3/132303035/75cd28bde029be.pdf
    • http://files.weigh-right.com/uploads/1/3/1/8/131856170/d7b0d67a0f.pdf
    • http://files.royalsiammoraga.com/uploads/1/3/1/6/131636866/fc34d3e3c.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pajotoliwafugesekediriw.pdf
    • https://cdn.shopify.com/s/files/1/0436/1850/0765/files/41545007215.pdf
    • https://cdn.shopify.com/s/files/1/0429/4855/9004/files/91165812187.pdf
    • https://cdn.shopify.com/s/files/1/0430/0403/5221/files/jugukaxerobukokimo.pdf
    • https://cdn.shopify.com/s/files/1/0428/5644/8156/files/muwiwek.pdf
    • https://cdn.shopify.com/s/files/1/0447/5407/5799/files/ambulance_driver_certificate_test_answers.pdf
    • https://cdn.shopify.com/s/files/1/0428/3020/0991/files/understanding_building_automation_systems.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/negonarufefozosaburesid.pdf
    • https://cdn.shopify.com/s/files/1/0432/3947/3314/files/17971596968.pdf
    • https://cdn.shopify.com/s/files/1/0431/3173/2132/files/java_tcp_server_send_message_to_client.pdf
    • https://cdn.shopify.com/s/files/1/0436/4392/8726/files/dadikozipezu.pdf
    • https://cdn.shopify.com/s/files/1/0435/3975/9263/files/83028446047.pdf
    • https://cdn.shopify.com/s/files/1/0433/7431/3621/files/flip_flop_diagram_and_truth_table.pdf
    • https://cdn.shopify.com/s/files/1/0427/6633/6167/files/25134392286.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000060c2.bin
f8c114d25b3c6f5fe389cbc0484b49cfd223ac7c8af78d35064975422a79b8f8
pdf-font-stream PDF embedded font (sfnt) at offset 0x60C2 5408 bytes
font_01_sfnt_off00007310.bin
4692a439243ee0f3f3811f7d3301c064c5483e05754661b28ce5d1d69e032964
pdf-font-stream PDF embedded font (sfnt) at offset 0x7310 10212 bytes